Device for driving vibration source

Abstract

A vibration source driving device that realizes various vibration functions on portable telephones. The vibration source driving device includes a sound source for generating musical tone signals in response to music data. A vibration source to generate vibration, a driver to drive the vibration and a control circuit are further included such that the vibration source may be driven in synchronization with the rhythm signal within the music data.

The invention claimed is: 
     
       1. A vibration source driving device comprising:
 a sound source for generating a musical tone signal in response to music data and for generating a vibration signal in synchronization with rhythm data within the music data; 
 at least one digital to analog converter (DAC) to perform digital to analog conversion on an output of the sound source selected from the group consisting of the musical tone signal and the vibration signal; 
 a vibration source that provides a first vibration system for causing resonance in a first frequency band and a second vibration system for causing resonance in a second frequency band that is lower than the first frequency band, so that the first vibration system generates sound, and the second vibration system generates vibration; 
 a rhythm data detection means for detecting rhythm data from the musical tone signal output from the sound source, thus outputting the rhythm data to the sound source to cause the sound source to generate the vibration signal in synchronization with the rhythm data; 
 a high-pass filter for eliminating low-frequency sounds from the musical tone signal; 
 a low-pass filter for eliminating higher harmonics components from the vibration signal; 
 an addition means for adding together an output signal of the high-pass filter and an output signal of the low-pass filter; and 
 a drive means for driving the vibration source based on an output signal of the addition means. 
 
     
     
       2. The vibration source driving device of  claim 1 , wherein the vibration source is a vibration speaker. 
     
     
       3. The vibration source driving device of  claim 1 , wherein the sound source is an FM sound source. 
     
     
       4. The vibration source driving device of  claim 1 , wherein the sound source utilizes pulse code modulation to generate the musical tone signal. 
     
     
       5. A vibration source driving device comprising:
 a sound source for generating a musical tone signal in response to music data and for generating a vibration signal; 
 a first digital to analog converter (DAC) to perform digital to analog conversion on the musical tone signal of the sound source; 
 an analog input; 
 a second DAC to perform digital to analog conversion on the vibration signal generated by the sound source; 
 a low pass filter to eliminate higher harmonics components from the output signal of the second DAC; 
 a first addition means to add an output signal of the first DAC and the analog input; 
 a second addition means to add an output signal of the first addition means and an output signal of the low pass filter; and 
 a drive means to drive a vibration speaker based on an output signal of the second addition means. 
 
     
     
       6. The vibration source driving device of  claim 5 , wherein the sound source is an FM sound source. 
     
     
       7. The vibration source driving device of  claim 5 , wherein the analog input is a speech signal.